Pressing Home/End keys (Microsoft's Windows OS) or Command-left arrow/Command-right arrow (Apple's Mac OS) moves the caret to the beginning/end of the line;
Squawk Box | Jack in the Box | box | Text messaging | The Box | Metal Box | Masoretic Text | box office | Box Hill | text | box lacrosse | Box | text editor | Text corpus | The Box of Delights | The Black Box Revelation | Pandora's box | Black Box | alt+Alt text | Third Text | The Slade Box | The Box (US TV channel) | The Box Tops | text corpus | Pali Text Society | Henry Box Brown | Chocolate box art | CD-Text | Box, Wiltshire | Box (play) |
A search box is usually a single-line text box with the dedicated function of accepting user input to be searched for in a database.